I've tried this programme twice now but I've had to stop it after like a month because I usually injure my hip flexor whilst doing squats, and this programme is all about the squats as most of you know. After buying the SS book I've learned that this could be a technique problem, specifically not keeping the knees out.
I was just wondering if anyone performs stretches before lifting? When is the best time to do them? After a 5 minute warmup on a cardio machine or before the warmup?